Question

How do you solve `21( 18- x ) = 15( 5x + 1)`?

Answer 1

`x = 121/32 = 3.78125`

Explanation:

Solve: `21(18-x) = 15(5x+1)`

Distribute both sides:
`378 - 21x = 75x + 15`

Put `x`'s on one side of the equation and the constants on the other:
`378 - 15 -21x + 21x = 75x +21x +15 - 15`

Simplify: `363 = 96x`

Divide both sides by `96`:
`x = 363/96 = 121/32`